ksz884x: convert to netdev_tx_t

Convert TX hook to netdev_tx_t type
Signed-off-by: NDenis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ksz884x.c

@@ -4854,7 +4854,7 @@ static inline void copy_old_skb(struct sk_buff *old, struct sk_buff *skb)
  *
  * Return 0 if successful; otherwise an error code indicating failure.
  */
-static int netdev_tx(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t netdev_tx(struct sk_buff *skb, struct net_device *dev)
 {
 	struct dev_priv *priv = netdev_priv(dev);
 	struct dev_info *hw_priv = priv->adapter;